Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb952cda9548fc5de47e8475f4f09c4019058830dcf0dd38b67dd26885dac58d' 
  AND token = 'Qiqm8AWXzNdt+InssKc4vG0Obkjrcl7BmLXyM1P2q3U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}